Stop type anti-scaling valve element sleeved with film and valve comprising valve element

Abstract

The invention relates to an anti-scaling valve element and a valve comprising the valve element. The anti-scaling valve element comprises a valve element body, wherein an external thread part is arranged on the outer side of the valve element body; a matched valve cover is arranged at the top of the valve element body; a cylindrical valve rod penetrates through an inner cavity of the valve element body and is sleeved with a return spring; an annular body is arranged at the lower end of the valve element body; an annular groove is formed in the valve rod and located at the lower end of the valve element body. The valve element further comprises an inverted-bottle-shaped sealing sleeve film with through holes in two ends, and a small opening part in the lower end of the sealing sleeve film is in interference fit with the annular groove of the valve rod, so that fixation and sealing are realized; the upper end of the sealing sleeve film is fixed on the outer diameter of the annular body in a sealing manner. The valve element and the valve are simple in structure and require a few parts; anti-scaling sealing of a travel part is realized, and the valve element is applicable to stop type valves with different travel intervals; with the adoption of the inverted-bottle-shaped sealing sleeve film, the hydraulic power effect is good, interference fit is realized, sealing is simple and effective, and the valve element and the valve are high in practicability and have higher market popularization value.

Description

technical field [0001] The invention relates to the field of valves, in particular to an anti-scaling valve core and a valve thereof. Background technique [0002] Globe valves are widely used in the field of construction pipelines. This type of valve moves downward through the valve stem, exerting pressure on the valve disc, and the valve disc contacts with the lower sealing surface to achieve a forced seal, thereby cutting off the pipeline medium. Globe valves, the way the valve stem moves downwards is to rotate downwards, which belongs to conventional globe valves, such as "A Globe Valve" with the announcement number CN104006168A; there are also electrothermal actuators or rotating handles that make the valve stem vertically press down, Most of these valve stems are cylindrical, such as "A Floor Heating Air Valve" of the announcement number CN203604791U; Method and its sub-catchment", the latter two cut-off valves, after the valve core is pressed, it returns to the open ...

AI Technical Summary

Problems solved by technology

"Although this structure can seal the bottom and prevent water from contacting the valve stem 2', there are many parts and the assembly is complicated; the most important thing is that the valve head is a multi-part assembly. Strong contact, easy to cause loosening, resulting in water leakage into the valve stem

b. The distance between the bonnet 4' and the valve head is large, which also leads to a large contact area between the corrugated sealing sleeve 5' and the water medium, and the corrugated sealing sleeve 5' is deformed under the impact of water flow; and The seal between the bonnet 4' and the corrugated sealing sleeve 5' is achieved by elasticity, and the impact and deformation of the water flow may cause water to leak into the valve stem from the upper part of the corrugated sealing sleeve 5'

c. The height of corrugated sealing sleeve 5' is fixed and cannot be adjusted according to the different distances between the bonnet 4' and the valve head

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